JAJSP77A November 2019 – August 2020 BQ79600-Q1
PRODUCTION DATA
This feature (Auto Host Wakeup/Reverse Wakeup) is only available if Section 7.3.5 is enabled.
The purpose of this user case is to keep BQ79600-Q1 in lowest power mode while still being able to detect fault information from stack devices. In this case, fault information transmittion is similar to that of SLEEP: top of stack device sends HB or Fault tone to BQ79600-Q1. The difference lies in the detection of those tones in BQ79600-Q1. In SHUTDOWN, TONE RX is off, only low power Section 7.3.5 is available. Once sniffer detects FAULT tone, it puts device into VALIDATE mode in which full power TONE RX is available, device would validate if true Fault tone exists or not. If yes, it triggers INH. See Figure 7-27 for different case.